Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1dafce6eeaf30bf…

MALICIOUS

PDF

74.4 KB Created: 2021-03-22 04:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c9b641e82426ec1f051cdef82b8e4e3 SHA-1: e0c7da2c4064b1e014fdcea4adcb99c7c29e3aa2 SHA-256: b1dafce6eeaf30bf59f54022c83c9e585b7cff456397d74b975dcc37468610e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, with one prominent URL leading to 'mezovuduw.ru', suggesting a phishing lure related to 'Xbox 360 cyber monday 2015 download'. The PDF structure also indicates a link farm, likely intended to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/wix?keyword=xbox+360+cyber+monday+2015+download
    • http://characduwe.space/fitted_bed_sheets_at_walmartz78x3.pdf
    • http://mesikigodijope.mypressonline.com/tonusadegowanurezafobam.pdf
    • http://xagugudel.sportsontheweb.net/lg_c9_max_refresh_rate.pdf
    • https://domaruvujus.weebly.com/uploads/1/3/2/6/132683142/tunaxodutom-legemarotuvoj-podipawamol-tadojemutu.pdf
    • http://spiritstudio.ru/how_to_clean_hp_photosmart_printheadr6mm2.pdf
    • https://jokisutenewaj.weebly.com/uploads/1/3/1/4/131483229/fefimez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_8ef8859a12bf418cb61782693072be7c.pdf?index=true
    • https://s3.amazonaws.com/wejuvono/zaxadem.pdf
    • https://uploads.strikinglycdn.com/files/07161b38-ceb6-43eb-a70c-043a624b7764/fumut.pdf
    • https://uploads.strikinglycdn.com/files/ba47e36a-9a56-47fa-8430-a0d2e59e9692/womakexumedibetakawa.pdf
    • https://uploads.strikinglycdn.com/files/425f34f9-4c83-402b-833f-488d6a93d622/1557020383.pdf
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_6fb173aa830e496294046c04ddbd084a.pdf?index=true
    • https://s3.amazonaws.com/bipovoromoj/baboy_bisaya_song.pdf
    • https://s3.amazonaws.com/kezemiradigu/what_are_the_four_curriculum_approaches.pdf
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_f0058ebf784d45bcad0368029768f5ff.pdf?index=true
    • https://s3.amazonaws.com/xukonakefules/free_grief_therapy_worksheets.pdf
    • https://s3.amazonaws.com/zazelujeju/resumen_del_libro_romeo_y_julieta.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc4.bin
a25d5119fb38a0db1b3bda56191f28cd7524389d6da0bd1c674095ac9a2763a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 6056 bytes
font_01_sfnt_off0000f46a.bin
bbb6d165f319578d585e7409e7700a2f80affba49727f6aafd8f2479ec9df29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 11316 bytes

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